Lymphatic and Immune System Quiz Flashcards Preview

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Flashcards in Lymphatic and Immune System Quiz Deck (43)
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1

Functions of Lymphatic System

Immunity
Lipid absorption
Fluid recovery

2

Organs Involved in Lymphatic System

Red bone marrow
Thymus
Tonsils
Spleen
Lymph nodes

3

Lymph

Clear, colorless fluid, similar to plasma but much less protein

4

Lymphatic Capillaries

Closed at one end
Tethered to surrounding tissue by protein filaments
Endothelial cells loosely overlapped

5

Lymphatic Vessels

Larger ones composed on tunica interna, tunica media, and tunica externa

6

Route of Lymph Flow

Lymphatic Capillaries
Collecting Vessels
Lymphatic Trunks
Collecting Ducts (Right Lymphatic and Thoracic)

7

Mechanisms of Lymph Flow

Low pressure and low speed
Aided by pumps
Moved along by rhythmic contractions of lymphatic vessels

8

Lymphatic Cells (Lymphocytes)

Natural Killer Cells
T Lymphocytes
B Lymphocytes
Antigen Presenting Cells

9

Lymphatic Tissue

Aggregations of lymphocytes in mucus membranes and CT of many organs

10

Lymph Nodes

Bean-shaped organs located around lymphatic vessels
Cortex and medulla
Flow is in one direction
Filter lymph

11

Palatine Tonsils

Pair at the posterior margin of the oral cavity

12

Lingual Tonsils

Pair at the root of the tongue

13

Pharyngeal Tonsil

Single tonsil on the wall of the pharynx (adenoid)

14

Thymus Gland

Two lobed organ in the mediastinum

15

Spleen

Red pulp filled with erythrocytes
While pulp filled with lymphocytes and macrophages
Blood reservoir and filters blood

16

2nd Line of Defense

Neutrophils, Eosinophils, Basophils, Macrophages

17

Neutrophils

Phagocytize bacteria
Create a killing zone
Kills itself

18

Eosinophils

Found in mucus membranes
Phagocytizes antigen-antibody complexes, allergens, and chemicals

19

Basophils

Secrete chemicals to attract leukocytes
Secrete histamine, leukotrienes, heparine

20

Macrophages

Displays foreign antigens
Secretes cytokines
Induces fever
Form outside of the circulatory system

21

Interferons

Produced by virally infected cells
Diffuse to neighboring cells to induce synthesis of antiviral proteins

22

Complement Proteins

Inactive proteins in blood plasma
When activated enhance immune, allergic, and inflammatory reactions

23

Antiviral Effect

Generalized protection
Activate natural killer cells and macrophages
Destroy infected host cells

24

Anticancer

Stimulate destruction of cancer cells

25

Pathways of Complement Activation

Classical pathway
Alternate pathway
Leptin pathway

26

Mechanisms of Action

Enhanced inflammation
Opsonization
Cytolysis
Phagocytosis

27

Classical Pathway

Begins with activation of C1
Specific response

28

Alternate Pathway

Begins with activation of C3

29

Leptin Pathway

Binds carbohydrates on the pathogen surface

30

C3A

Leads to inflammation